LEVEL HORMON TRIIODOTHYRONINE DAN THYROKSIN SAAT ESTRUS DAN OVULASI PADA SAPI BALI

• Main Author: Perpustakaan UGM, i-lib
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2011
• Subjects: Jurnal i-lib UGM
• Online Access: https://repository.ugm.ac.id/28509/; http://i-lib.ugm.ac.id/jurnal/download.php?dataId=11572
• Institution: Universitas Gadjah Mada

The thyroid hormone governs growth, differentiation and metabolism in nearly all somatic tissues. Abnormal thyroid hormone levels have been reported to lead to infertility or reduced reproductive function. One of speculated roles of thyroid hormones currently under review is the direct regulation of steriodogepesis within the ovarian follicular cellslby the hormone. The aim ofthe study was to detect the level triiodotryronin (T3) and thyroxine (T4) of Bali cattle at estrus and ovulation time. The study was conducted using four Bali cattle. All the treated cattle had the same age (approxymately two years) and kept in healthy conditon. Estrus detection was performed daily and the ovulation time was detected by ultrasonography. Blood samples were collected from jugular vein at estrus and ovulation time. Serum level of triiodothironine and thyroxine were assayed using enzime linked immunosorbent assay (ELISA). The results showed that level T3 at estrus and ovulation time were 1,46 ng/dl:l: 0,173 and 1,98 ng/ml:l: 0,41, respectively. Level ofT4 at estrus time and ovulation time were 10,43:1: 0,442 and 10,48:1: 0,896, respectively. Ratio T3/T4 was 0,14:1: 0,011 at estrus time and 0,19:1: 0,03 at ovulation time. The level T3, T4 and ratio T3/T4 were not different s~gnificantly (p>0,05) between at estrus and ovulation time. The present study concluded the, T3 and T4 may have direct stimulatory effects on ovarian function.